Science-Backed Health Calculators for Your Pets
Instant, clinically accurate nutritional and biological calculators based on NRC & WSAVA standards. Zero sign-up, 100% free forever.
Cat Health & Nutrition Tools
Cat Daily Calorie & Feeding Amount Calculator
Calculate exact daily calorie requirements (RER & MER) and kibble grams for your cat. Science-backed formulas for kittens, neutered, and senior cats.
Cat Years to Human Years Calculator
See how cat years convert to human years with a free AAFP chart. A 1-year-old cat is about 15 human years, 10 is about 56, and 12 is about 64.
Cat Daily Water Intake & Hydration Calculator
How much water does your cat need per day? Calculate exact ml & oz required based on weight and diet (dry vs canned wet food) to protect kidney and urinary health.
Dog Health & Nutrition Tools
Dog Chocolate Toxicity Estimator
Estimate the clinical danger level of milk, dark, or cocoa chocolate ingestion based on dog body weight.
Puppy Adult Weight Predictor
Predict your puppy’s full-grown adult size and weight curve from current age and breed size category.
Dog Daily Calorie & Food Calculator
Calculate precise maintenance energy (MER) and feeding kibble portions for active, neutered, and working dogs.